GGH is an important device in flue gas desulfurization syestem. Its role is to use the original flue gas to heat net flue gas after desulfurization, reduce the original flue gas temperature increase net flue gas temperature to reach the specified discharge requirements(more than about 80 ºC), through chimneys discharged into the atmosphere.
Product feature 
Improve the exhaust temperature and lifiting height: flue gas reheat exhaust temperature of wet flue gas desulfurization can be increased from 50ºC-70ºC to 80ºC-100ºC above, so as to improve the lifiting height diffusion ability of flue gas from chimneys emissions, is helpful to reduce pollution;
Solve throughly the porblems of dew point corrosion and low heat transfer efficiency of metal tubes:SiC is a single-phase, pressureless sintered SiC ceramics with high purity, fine grain and very low porosity. It is  suitable for extreme enviroments of high temperature, high pressure, strong corrosion and high wear, and completely solve the problem of dew point corrosion. At the same time, silicon carbide also has super high thermal conductivity, which effectively solves the problem of low heat transfer efficiency of metal or enamel tubes.
Improve desulfurization efficiency:desulfurization efficiency increases with the decrease of flue gas temperature at the inlet of absorption tower, so the system usually uses GGH device to cool the original flue gas.
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